One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,7,5,4)(9,10,13,12)(11,15,16,14)(17,18,23,25)(19,24,27,31)(20,29,30,21)(22,26,28,32)(1,3,6,5)(2,7,8,4)(9,11,13,16)(10,14,12,15)(17,19,23,27)(18,24,25,31)(20,28,30,22)(21,26,29,32)(2,8)(4,7)(9,10,13,12)(11,14,16,15)(18,25)(19,27)(20,30)(26,32)(1,4)(2,3)(5,8)(6,7)(9,10,13,12)(11,14,16,15)(17,20)(18,21)(19,28)(22,27)(23,30)(24,26)(25,29)(31,32)(1,5,6,3)(2,4,8,7)(9,12,13,10)(11,15,16,14)(17,21)(18,20)(19,26)(22,31)(23,29)(24,28)(25,30)(27,32)(17,22,23,28)(18,26,25,32)(19,20,27,30)(21,24,29,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.